Hi, this is has been alluded to in a previous post (
https://paramquery.com/forum/index.php?topic=2200.0), but as it's old, I'll start a new topic.
When using column header groupings, frozen columns and/or virtual scrolling result in those grouped headers not being rendered correctly.
It is worst when using virtualX and frozen columns are applied at the same time. Coulmn headers disappear as you scroll, and headers appear above the wrong columns.
Please see the attachments. "Before Scrolling" is how the grid looks before scrolling and all is fine. In "After scrolling", note that the top column group has vanished. Also note the "Totals" column header - that should be at the far right above the grey cells.
This bug goes all the way back to 2.2.0, which I'm using, so it'd be great if any fix could be applied to that.
